<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <form action="target.html">
    
        <!-- 
            autocomplete="on"默认等于on  开启自动补全
            autocomplete="off"关闭自动补全
            disabled将表单设置为禁用 数据不会提交
            autofocus自动获取焦点
         -->
        <input type="text" name="username" value="hello">
        <br><br>
        <input type="submit">
        <!-- 普通按钮 -->
        <input type="button" value="按钮">
        <!-- 重置按钮 -->
        <input type="reset" >
    </form>
</body>
</html>